Merge tag '0.14.1' into develop

0.14.1 (2018-06-06)
-------------------

Upgrade instructions are available at https://docs.funkwhale.audio/upgrading.html

Enhancements:

- Display server version in the footer (#270)
- fix_track_files will now update files with bad mimetype (and not only the one
  with no mimetype) (#273)
- Huge performance boost (~x5 to x7) during CLI import that queries MusicBrainz
  (#288)
- Removed alpha-state transcoding support (#271)

Bugfixes:

- Broken logging statement during import error (#274)
- Broken search bar on library home (#278)
- Do not crash when importing track with an artist that do not match the
  release artist (#237)
- Do not crash when tag contains multiple uuids with a / separator (#267)
- Ensure we do not store bad mimetypes (such as application/x-empty) (#266)
- Fix broken "play all" button that played only 25 tracks (#281)
- Fixed broken track download modal (overflow and wrong URL) (#239)
- Removed hardcoded size limit in file upload widget (#275)

Documentation:

- Added warning about _protected/music location in nginx configuration (#247)

Removed alpha-state transcoding (#271)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

A few months ago, a basic transcoding feature was implemented. Due to the way
this feature was designed, it was slow, CPU intensive on the server side,
and very tightly coupled to the reverse-proxy configuration, preventing
it to work Apache2, for instance. It was also not compatible with Subsonic clients.

Based on that, we're currently removing support for transcoding
**in its current state**. The work on a better designed transcoding feature
can be tracked in https://code.eliotberriot.com/funkwhale/funkwhale/issues/272.

You don't have to do anything on your side, but you may want to remove
the now obsolete configuration from your reverse proxy file (nginx only)::

    # Remove those blocks:

    # transcode cache
    proxy_cache_path /tmp/funkwhale-transcode levels=1:2 keys_zone=transcode:10m max_size=1g inactive=7d;

    # Transcoding logic and caching
    location = /transcode-auth {
        include /etc/nginx/funkwhale_proxy.conf;
        # needed so we can authenticate transcode requests, but still
        # cache the result
        internal;
        set $query '';
        # ensure we actually pass the jwt to the underlytin auth url
        if ($request_uri ~* "[^\?]+\?(.*)$") {
            set $query $1;
        }
        proxy_pass http://funkwhale-api/api/v1/trackfiles/viewable/?$query;
        proxy_pass_request_body off;
        proxy_set_header        Content-Length "";
    }

    location /api/v1/trackfiles/transcode/ {
        include /etc/nginx/funkwhale_proxy.conf;
        # this block deals with authenticating and caching transcoding
        # requests. Caching is heavily recommended as transcoding
        # is a CPU intensive process.
        auth_request /transcode-auth;
        if ($args ~ (.*)jwt=[^&]*(.*)) {
            set $cleaned_args $1$2;
        }
        proxy_cache_key "$scheme$request_method$host$uri$is_args$cleaned_args";
        proxy_cache transcode;
        proxy_cache_valid 200 7d;
        proxy_ignore_headers "Set-Cookie";
        proxy_hide_header "Set-Cookie";
        add_header X-Cache-Status $upstream_cache_status;
        proxy_pass   http://funkwhale-api;
    }
    # end of transcoding logic